Logger (Play 2.5.18)

java.lang.Object
- play.Logger

```
public class Logger
extends java.lang.Object
```
High level API for logging operations. Example, logging with the default application logger:
```
 Logger.info("Hello!");
```
Example, logging with a custom logger:
```
 Logger.of("my.logger").info("Hello!")
```
Each of the logging methods is overloaded to be able to take an array of arguments. These are formatted into the message String, replacing occurrences of '{}'. For example:
```
 Logger.info("A {} request was received at {}", request.method(), request.uri());
 
```
This might print out:
```
 A POST request was received at /api/items
 
```
This saves on the cost of String construction when logging is turned off. This API is intended as a simple logging API to meet 99% percent of the most common logging needs with minimal code overhead. For more complex needs, the underlying() methods may be used to get the underlying SLF4J logger, or SLF4J may be used directly.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class Logger.ALogger
Typical logger interface

Nested Classes
Modifier and Type	Class and Description
`static class`	`Logger.ALogger` Typical logger interface

Constructor Summary

Constructors
Constructor and Description

Logger()

Constructors
Constructor and Description
`Logger()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`debug(java.lang.String message)` Log a message with the DEBUG level.
`static void`	`debug(java.lang.String message, java.lang.Object... args)` Log a message with the DEBUG level.
`static void`	`debug(java.lang.String message, java.lang.Throwable error)` Log a message with the DEBUG level.
`static void`	`error(java.lang.String message)` Log a message with the ERROR level.
`static void`	`error(java.lang.String message, java.lang.Object... args)` Log a message with the ERROR level.
`static void`	`error(java.lang.String message, java.lang.Throwable error)` Log a message with the ERROR level.
`static void`	`info(java.lang.String message)` Log a message with the INFO level.
`static void`	`info(java.lang.String message, java.lang.Object... args)` Log a message with the INFO level.
`static void`	`info(java.lang.String message, java.lang.Throwable error)` Log a message with the INFO level.
`static boolean`	`isDebugEnabled()` Returns `true` if the logger instance enabled for the DEBUG level?
`static boolean`	`isErrorEnabled()` Returns `true` if the logger instance enabled for the ERROR level?
`static boolean`	`isInfoEnabled()` Returns `true` if the logger instance enabled for the INFO level?
`static boolean`	`isTraceEnabled()` Returns `true` if the logger instance enabled for the TRACE level?
`static boolean`	`isWarnEnabled()` Returns `true` if the logger instance enabled for the WARN level?
`static Logger.ALogger`	`of(java.lang.Class<?> clazz)` Obtain a logger instance.
`static Logger.ALogger`	`of(java.lang.String name)` Obtain a logger instance.
`static void`	`trace(java.lang.String message)` Log a message with the TRACE level.
`static void`	`trace(java.lang.String message, java.lang.Object... args)` Log a message with the TRACE level.
`static void`	`trace(java.lang.String message, java.lang.Throwable error)` Log a message with the TRACE level.
`static org.slf4j.Logger`	`underlying()` Get the underlying application SLF4J logger.
`static void`	`warn(java.lang.String message)` Log a message with the WARN level.
`static void`	`warn(java.lang.String message, java.lang.Object... args)` Log a message with the WARN level.
`static void`	`warn(java.lang.String message, java.lang.Throwable error)` Log a message with the WARN level.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Logger
```
public Logger()
```
- Method Detail
  - of
```
public static Logger.ALogger of(java.lang.String name)
```
    Obtain a logger instance.
    
    Parameters:
    
    name - name of the logger
    
    Returns:
    
    a logger
  - of
```
public static Logger.ALogger of(java.lang.Class<?> clazz)
```
    Obtain a logger instance.
    
    Parameters:
    
    clazz - a class whose name will be used as logger name
    
    Returns:
    
    a logger
  - underlying
```
public static org.slf4j.Logger underlying()
```
    Get the underlying application SLF4J logger.
    
    Returns:
    
    the underlying logger
  - isTraceEnabled
```
public static boolean isTraceEnabled()
```
    Returns true if the logger instance enabled for the TRACE level?
    
    Returns:
    
    true if the logger instance enabled for the TRACE level?
  - isDebugEnabled
```
public static boolean isDebugEnabled()
```
    Returns true if the logger instance enabled for the DEBUG level?
    
    Returns:
    
    true if the logger instance enabled for the DEBUG level?
  - isInfoEnabled
```
public static boolean isInfoEnabled()
```
    Returns true if the logger instance enabled for the INFO level?
    
    Returns:
    
    true if the logger instance enabled for the INFO level?
  - isWarnEnabled
```
public static boolean isWarnEnabled()
```
    Returns true if the logger instance enabled for the WARN level?
    
    Returns:
    
    true if the logger instance enabled for the WARN level?
  - isErrorEnabled
```
public static boolean isErrorEnabled()
```
    Returns true if the logger instance enabled for the ERROR level?
    
    Returns:
    
    true if the logger instance enabled for the ERROR level?
  - trace
```
public static void trace(java.lang.String message)
```
    Log a message with the TRACE level.
    
    Parameters:
    
    message - message to log
  - trace
```
public static void trace(java.lang.String message,
                         java.lang.Object... args)
```
    Log a message with the TRACE level.
    
    Parameters:
    
    message - message to log
    
    args - The arguments to apply to the message String
  - trace
```
public static void trace(java.lang.String message,
                         java.lang.Throwable error)
```
    Log a message with the TRACE level.
    
    Parameters:
    
    message - message to log
    
    error - associated exception
  - debug
```
public static void debug(java.lang.String message)
```
    Log a message with the DEBUG level.
    
    Parameters:
    
    message - message to log
  - debug
```
public static void debug(java.lang.String message,
                         java.lang.Object... args)
```
    Log a message with the DEBUG level.
    
    Parameters:
    
    message - message to log
    
    args - The arguments to apply to the message String
  - debug
```
public static void debug(java.lang.String message,
                         java.lang.Throwable error)
```
    Log a message with the DEBUG level.
    
    Parameters:
    
    message - message to log
    
    error - associated exception
  - info
```
public static void info(java.lang.String message)
```
    Log a message with the INFO level.
    
    Parameters:
    
    message - message to log
  - info
```
public static void info(java.lang.String message,
                        java.lang.Object... args)
```
    Log a message with the INFO level.
    
    Parameters:
    
    message - message to log
    
    args - The arguments to apply to the message string
  - info
```
public static void info(java.lang.String message,
                        java.lang.Throwable error)
```
    Log a message with the INFO level.
    
    Parameters:
    
    message - message to log
    
    error - associated exception
  - warn
```
public static void warn(java.lang.String message)
```
    Log a message with the WARN level.
    
    Parameters:
    
    message - message to log
  - warn
```
public static void warn(java.lang.String message,
                        java.lang.Object... args)
```
    Log a message with the WARN level.
    
    Parameters:
    
    message - message to log
    
    args - The arguments to apply to the message string
  - warn
```
public static void warn(java.lang.String message,
                        java.lang.Throwable error)
```
    Log a message with the WARN level.
    
    Parameters:
    
    message - message to log
    
    error - associated exception
  - error
```
public static void error(java.lang.String message)
```
    Log a message with the ERROR level.
    
    Parameters:
    
    message - message to log
  - error
```
public static void error(java.lang.String message,
                         java.lang.Object... args)
```
    Log a message with the ERROR level.
    
    Parameters:
    
    message - message to log
    
    args - The arguments to apply to the message string
  - error
```
public static void error(java.lang.String message,
                         java.lang.Throwable error)
```
    Log a message with the ERROR level.
    
    Parameters:
    
    message - message to log
    
    error - associated exception

Class Logger

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Logger

Method Detail

of

of

underlying

isTraceEnabled

isDebugEnabled

isInfoEnabled

isWarnEnabled

isErrorEnabled

trace

trace

trace

debug

debug

debug

info

info

info

warn

warn

warn

error

error

error